What does Dual VVT mean?
2 Answers
Dual VVT separately controls the engine's intake and exhaust systems. During rapid acceleration, the intake VVTi advances the intake timing and increases valve lift, while the exhaust VVTi delays the exhaust timing. This effect is similar to a small turbocharger, effectively enhancing engine power. Additionally, the increased air intake ensures more complete combustion of gasoline, achieving the goal of low emissions. The maintenance methods for a Dual VVT engine are: 1. Maintain good crankcase ventilation; 2. Regularly change the oil and filter; 3. Periodically clean the crankcase; 4. Regularly clean the radiator; 5. Periodically clean the fuel system; 6. Use lubricants appropriately.
In all my years of driving, the dual VVT has been a design that makes the engine smarter. It allows the opening and closing times of both the intake and exhaust valves to vary freely. Like when I was younger and drove that old car which always guzzled fuel, but after switching to a car with dual VVT, I saved a lot on expenses. Simply put, while the engine is running, the system automatically adjusts the valve timing based on speed—saving fuel at low speeds and delivering strong power at high speeds, while also reducing exhaust pollution. I think this feature is great for people who often deal with city traffic jams or go on long trips—it's practical and eco-friendly. Some older cars only have single valve control, which is far less efficient than dual VVT. Remember, it's important to regularly check the engine oil and overall engine health during maintenance to prevent carbon buildup from affecting performance.
